/*
JWildfire - an image and animation processor written in Java
Copyright (C) 1995-2011 Andreas Maschke
This is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this software;
if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jwildfire.transform;
import org.jwildfire.base.Property;
import org.jwildfire.base.PropertyMax;
import org.jwildfire.base.PropertyMin;
import org.jwildfire.image.Pixel;
import org.jwildfire.image.SimpleImage;
import org.jwildfire.image.WFImage;
public class DisplaceTransformer extends Mesh2DTransformer {
@Property(description = "Intensity of pixel displacement")
@PropertyMin(0)
private int radius = 20;
@Property(description = "Displacement probability")
@PropertyMin(0)
@PropertyMax(100)
private int probability = 100;
@Property(description = "Seed for the random number generator")
@PropertyMin(0)
private int seed = 0;
@Override
protected void performPixelTransformation(WFImage pImg) {
SimpleImage img = (SimpleImage) pImg;
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
int probability = this.probability;
int rrad = this.radius;
srand123(seed);
Pixel sPixel = new Pixel();
if (probability == 100) {
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
sPixel.setARGBValue(img.getARGBValue(j, i));
int sr = sPixel.r;
int sg = sPixel.g;
int sb = sPixel.b;
int dx = (int) (rrad * drand() + 0.5);
int dy = (int) (rrad * drand() + 0.5);
int px = j + dx;
int py = i + dy;
if (px < 0)
px = 0;
else if (px >= width)
px = width - 1;
if (py < 0)
py = 0;
else if (py >= height)
py = height - 1;
sPixel.setARGBValue(img.getARGBValue(px, py));
int rp = sPixel.r;
int gp = sPixel.g;
int bp = sPixel.b;
img.setRGB(j, i, rp, gp, bp);
img.setRGB(px, py, sr, sg, sb);
}
}
}
else {
double rprob = (double) ((double) 1.0 - (double) probability / (double) 100.0);
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
sPixel.setARGBValue(img.getARGBValue(j, i));
int sr = sPixel.r;
int sg = sPixel.g;
int sb = sPixel.b;
if (drand() >= rprob) {
int dx = (int) (rrad * drand() + 0.5);
int dy = (int) (rrad * drand() + 0.5);
int px = j + dx;
int py = i + dy;
if (px < 0)
px = 0;
else if (px >= width)
px = width - 1;
if (py < 0)
py = 0;
else if (py >= height)
py = height - 1;
sPixel.setARGBValue(img.getARGBValue(px, py));
int rp = sPixel.r;
int gp = sPixel.g;
int bp = sPixel.b;
img.setRGB(j, i, rp, gp, bp);
img.setRGB(px, py, sr, sg, sb);
}
}
}
}
}
@Override
public void initDefaultParams(WFImage pImg) {
radius = 20;
probability = 100;
seed = 0;
}
private int a123 = 1;
private final int RAND_MAX123 = 0x7fffffff;
private int rand123() {
return (a123 = a123 * 1103515245 + 12345) % RAND_MAX123;
}
private void srand123(int pSeed) {
a123 = pSeed;
}
private double rrmax = 1.0 / (double) RAND_MAX123;
private double drand() {
double res = ((double) (rand123() * rrmax));
return (res < 0) ? 0.0 - res : res;
}
public int getRadius() {
return radius;
}
public void setRadius(int radius) {
this.radius = radius;
}
public int getProbability() {
return probability;
}
public void setProbability(int probability) {
this.probability = probability;
}
public int getSeed() {
return seed;
}
public void setSeed(int seed) {
this.seed = seed;
}
}